During the early summer months of 1927, 1928 and 1929, several fruit growers in the Salmon Arm district of British Columbia noticed severe injury to the small developing fruits of their pear trees. By the end of June as high as 80 per cent. of the small pears had fallen from some of the trees, and the majority of those remaining were deformed and unmarketable at harvesting time.

The manner in which bees and wasps repeatedly find their way back to their nests or to certain other places has been a source of wonderment to many and the subject of serious investigations upon the part of but few. The justly illustrious Fabre in considering the homing of many insects was led to believe that wasps and bees found they way back and forth from the nest by a special sense.

A very interesting collection of Ephemeroptera was brought back to Ottawa by Mr. W. J. Brown who spent the entire summer of 1929 on an insect faunal survey along the north shore of the Gulf of St. Lawrence, the survey extending from Trinity Bay in the west, where the fauna is still typically Canadian and Hudsonian, to Bradore Bay at the entrance to the Straits of Belle Isle, where the conditions are very similar to those found on the Labrador coast.

For the material here reported upon I am indebted to Dr. L. H. Dunn, of the Gorgas Memorial Laboratory, and Prof. C. H. Vorhies, of the University of Arizona.